_______________ is a rotary type of drill and its bit consists of a metal mould or Matrix containing a large number of diamonds.(a) Percussion drilling(b) Shot drill(c) Diamond drill(d) Churn drillI got this question in an interview for internship.My enquiry is from Equipments topic in portion Construction Equipments of Construction & Building Materials

_______________ is a rotary type of drill and its bit consists of a me

1.	_______________ is a rotary type of drill and its bit consists of a metal mould or Matrix containing a large number of diamonds.(a) Percussion drilling(b) Shot drill(c) Diamond drill(d) Churn drillI got this question in an interview for internship.My enquiry is from Equipments topic in portion Construction Equipments of Construction & Building Materials
Answer» Right answer is (c) Diamond drill The explanation: The Diamond drill is rotated and the diamonds disintegrate the ROCK. The RATE of drilling with a diamond drill will depend on the type of rock and it varies from 300 mm to SEVERAL METRES per hour. Diamond drills are capable of drilling holes in excess of 300 meters.

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